KR20000072892A - Wireless camcoder - Google Patents

Abstract

PURPOSE: A camcorder with a wireless communication function between a camera portion and a deck portion of the camcorder is provided to transmit a camera signal(a video, audio and deck signal) of the camcorder to the deck of the camcorder with wireless communication capability, thereby increasing portability. CONSTITUTION: The camcorder with a wireless communication function between a camera portion and a deck portion of the camcorder comprises a camera(10) for taking a picture of an object and inputting a sound signal and controlling the deck, a wireless transmitting portion(20) for transmitting a signal from the camera by wireless, a wireless receiving portion(30) for receiving a radio signal from the wireless transmitting portion, and a deck portion(40) for receiving and recording the radio signal from the wireless receiving portion and reproducing the recorded signal. In the camcorder, the wireless transmitting portion comprises an audio FM modulating portion for classifying the audio signal from the camera into a right and left audio signal and modulating the signal, and a deck FM modulating portion for modulating a deck signal from the camera, a frequency composing portion for composing the video signal, the audio signal and the deck signal, and a frequency converting portion for converting the frequency of an output signal from the frequency composing portion into a high frequency.

Description

Wireless Camcorder between Camera and Deck {WIRELESS CAMCODER}

The present invention relates to a wireless camcorder between a camera and a deck (VCR deck), and in particular, by wirelessly transmitting signals (video, audio and deck signals) of the camera of the camcorder, and by receiving them wirelessly from the deck of the camcorder, The present invention relates to a wireless camcorder between the deck and the camera that can improve the ease of use.

In general, a camcorder includes a camera unit for photographing a subject and a deck unit for recording and reproducing a subject photographed through the camera unit. Such a conventional camcorder, although portable, is integral with the camera unit and the deck unit. Since the camcorder is large and heavy, it is difficult to carry.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and therefore, an object of the present invention is to wirelessly transmit a camera signal (video, audio and deck signal) of a camcorder, and to receive it wirelessly from a deck of the camcorder. In addition, the present invention provides a wireless camcorder between the camera and the deck that can improve the convenience of carrying and using.

1 is an overall configuration diagram of a wireless camcorder between a camera and a deck according to the present invention.

2 is a diagram illustrating an internal configuration of the radio transmitter of FIG.

3 is a frequency characteristic diagram of the synthesized signal of FIG. 2.

4 is a diagram illustrating an internal configuration of the radio receiver of FIG. 1.

5 is a frequency characteristic diagram of the received signal of FIG.

Explanation of symbols on the main parts of the drawings

10: video camera 20: wireless transmitter

21: audio FM modulator 22: deck FM modulator

23: frequency synthesis unit 24: frequency conversion unit

25: RF amplifier 30: wireless receiver

31: RF band pass filter 32: RF amplifier

33: frequency converter 34: IF band pass filter

35: FM demodulator 36: Band pass filter for each band

37: video buffer section 38: audio FM demodulation section

39: deck FM demodulator

As a technical means for achieving the above object of the present invention, the wireless camcorder between the camera and the deck of the present invention, the wireless camcorder, the camera unit for photographing the subject, input the audio signal, and controls the deck unit; A wireless transmitter for wirelessly transmitting a signal of the camera unit; A radio receiver for receiving a radio signal of the radio transmitter; And a deck unit for receiving and recording a radio signal from a radio receiver and reproducing the recorded signal.

Hereinafter, a wireless camcorder between a camera and a deck according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

1 is an overall configuration diagram of a wireless camcorder between a camera and a deck according to the present invention. Referring to FIG. 1, the wireless camcorder between the deck and a camera according to the present invention photographs a subject, inputs a voice signal, and controls a deck unit. A camera unit 10, a wireless transmitter 20 for wirelessly transmitting a signal from the camera unit 10, a wireless receiver 30 for receiving a wireless signal from the wireless transmitter 20, and a wireless receiver 30 And a deck unit 40 for receiving and recording radio signals from the radio signal and reproducing the recorded signals.

2 is an internal configuration diagram of the wireless transmitter of FIG. 1. Referring to FIG. 2, the wireless transmitter 20 modulates an audio signal from the camera unit 10 into right and left audio signals and modulates the audio FM modulation. The deck 21, the deck FM modulator 22 for modulating the deck signal from the camera unit 10, the video signal from the camera unit 10, the audio signal and the deck FM of the audio FM modulator 21. A frequency synthesizer 23 for synthesizing the frequencies of the deck signals of the modulator 22, a frequency converter 24 for converting the frequency of the output signal of the frequency synthesizer 23 into high frequencies, and a frequency converter ( And an RF amplifier 25 for amplifying the output signal of 24, and a transmission antenna ANT1 for wirelessly transmitting the output signal of the RF amplifier 25.

In addition, the audio FM modulator 21 sets different subcarrier frequencies for the right and left audio signals, and the deck FM modulator 22 sets the subcarrier frequency for the deck signal to a subcarrier frequency for the audio signal. Configure it differently.

FIG. 3 is a frequency characteristic diagram of the frequency synthesized signal of FIG. 2. In FIG. 3, the synthesized signal output from the frequency synthesizer 23 includes a video signal (3.58 MHz) and a right and left audio signal (5.5 MHz and 6.0 MHz). ) And deck signal (6.5MHz) are synthesized.

FIG. 4 is an internal configuration diagram of the radio receiver of FIG. 1. Referring to FIG. 4, the radio receiver 30 receives an antenna ANT2 for receiving radio signals from the radio transmitter 20 and an antenna ANT2. Frequency band and the oscillation frequency of the RF band pass filter 31 for band-passing the received signal from the RF band, the RF amplifier 32 for amplifying the output signal of the band pass filter, and the output signal of the RF amplifier 32. A frequency converter 33 for mixing the intermediate frequency (IF) signal to provide an intermediate frequency (IF) signal, an IF bandpass filter 34 for passing the intermediate frequency signal among the output signals of the frequency converter 33, and an IF bandpass filter 34 An FM demodulator 35 for demodulating the output signal of the band, a band pass filter 36 for passing each of the video signal, the audio signal, and the deck signal output from the FM demodulator 35 for each band, and the band To the video buffer unit 37 for outputting the video signal from the pass filter unit 36 and the pass filter unit for each band 36 And an audio FM demodulation section 38 for demodulating the audio signals from the right and left audio signals, and a deck FM demodulation section 39 for demodulating the deck signal from the band pass filter section 36.

In addition, the band pass filter 36 bands the first filter 36a for band-passing the video signal from the FM demodulator 35 and the right and left audio signals from the FM demodulator 35, respectively. And second and third filters 36b and 36c for passing therethrough, and a fourth filter 36d for band-passing the deck signal from the FM demodulator 35.

FIG. 5 is a frequency characteristic diagram of the received signal of FIG. 4, and FIG. 5 shows that the synthesized signal is loaded at a high frequency of approximately 2.4 GHz, which is a main carrier frequency band.

Operation according to the wireless camcorder between the camera and the deck of the present invention configured as described above will be described in detail below with reference to the accompanying drawings.

First, with respect to the present invention with reference to Figure 1, holding the camera unit 10 and the wireless transmitter 20, the wireless receiver 30 and the deck unit 40 is easy to carry when worn around the waist, In brief description of the operation of such a camcorder, the camera unit 10 provides a video signal, an audio signal, and a deck signal to the radio transmitter 20, and the radio transmitter 20 is provided with the angles from the camera unit 10. Modulates the signal into a high frequency signal and transmits the signal, and the radio receiver 30 receives and demodulates the radio signal from the radio transmitter 20 to the deck unit 40, where the deck unit 40 is the radio receiver 30. The audio signal and the audio signal are processed according to the deck signal from

In more detail, first, the camera unit 10 outputs a video signal V by photographing a subject to the wireless transmitter 20, and receives an audio signal through a microphone or the like and outputs an audio signal AR or AL. ) Is output to the wireless transmitter 20, and in order to control the operation of the deck unit 40, the deck signal input through the control panel or the manipulator is output to the wireless transmitter 20.

The audio FM modulator 21 of the wireless transmitter 20 modulates the right and left audio signals into different subcarrier frequencies, respectively, from the audio signal input from the camera unit 10, for example, the right audio signal. The subcarrier frequency of is 5.5MHz and the subcarrier frequency of the left audio signal is 6.0MHz. The deck FM modulator 22 modulates the deck signal from the camera unit 10 with a subcarrier frequency different from the audio signal. For example, the subcarrier frequency is 6.6 MHz.

The video signal (V: 3.58 MHz) from the camera unit 10, the audio signal (AR: 5.5 MHz, AL: 6.0 MHz) from the audio FM modulator 21, and the deck FM modulator 22. Each of the deck signals DK of 6.5 MHz is frequency synthesized in the frequency synthesizer 23, as shown in Fig. 3, and the frequency synthesized signal is oscillated at approximately 2.4 GHz in the frequency converter 24. After converted into a high frequency signal according to the amplified to the transmission level set by the RF amplifier 25 is transmitted wirelessly through the transmission antenna (ANT1).

In this way, the high frequency signal transmitted from the radio transmitter 20 is received through the receiving antenna ANT2 of the radio receiver 30, and then band-passed by the RF bandpass filter 31 and amplified by the RF amplifier 32. The converting unit 33 converts the intermediate frequency IF signal according to the oscillation frequency. The intermediate frequency signal thus converted is a 3.58 MHz video signal, a 5.5 MHz right audio signal, a 6.0 MHz left audio signal through a demodulation process in the FM demodulator 35 after being band-passed by the IF band pass filter 34. And 6.5 MHz deck signals are respectively restored to the synthesized synthesized signal.

The video signal included in the synthesized signal from the FM demodulator 35 passes through the first filter 36a of the pass-by-pass filter unit 36 for each band and is output to the deck unit 40 through the video buffer unit 37. do. Also, the right audio signal included in the synthesized signal passes through the second filter 36b of the pass filter 36 for each band, and the left audio signal included in the synthesized signal passes through the third filter of the pass filter 36 for each band. Passing through the filter 36c, each of the right and left audio signals is restored to the audio signal through the demodulation process of the audio FM demodulator 38 and output to the deck unit 40. The deck signal included in the synthesized signal passes through the fourth filter 36a of the pass-through filter 36 for each band and is then demodulated by the deck FM demodulator 39 and then output to the deck unit 40.

The deck unit 40 decodes the deck signal, and then records the video signal and the audio signal on a predetermined recording medium or outputs it to a predetermined output device according to the decoding result, or the video signal recorded on the predetermined recording medium. And reproduces the audio signal to a predetermined output device.

As described above, in the present invention, the camera portion for capturing the projectile and the deck portion for recording and reproducing video and audio signals are made relatively wireless, so that the camera portion and the deck portion are integrated, compared to a conventional camcorder in which the camera portion is integrally portable. It becomes easy.

According to the present invention as described above, by transmitting the signal (video, audio and deck signal) of the camera of the camcorder wirelessly, and to receive it wirelessly from the deck of the camcorder, it is possible to improve the convenience of carrying and use will be.

The above description is only a description of one embodiment of the present invention, the present invention is capable of various changes and modifications within the scope of the configuration.

Claims (6)

In a wireless camcorder, A camera unit 10 photographing a subject, inputting a voice signal, and controlling a deck unit; A wireless transmitter 20 for wirelessly transmitting a signal of the camera unit 10; A radio receiver 30 that receives radio signals from the radio transmitter 20; A deck unit 40 which receives and records a radio signal from the radio receiver 30 and reproduces the recorded signal; Wireless camcorder between the deck and the camera comprising a. The method of claim 1, wherein the wireless transmitter 20 An audio FM modulator 21 for modulating the audio signal from the camera unit 10 into right and left audio signals; A deck FM modulator 22 for modulating the deck signal from the camera unit 10; A frequency synthesizer 23 for synthesizing the frequencies of the video signal from the camera unit 10, the audio signal of the audio FM modulator 21, and the deck signal of the deck FM modulator 22; A frequency converter 24 for converting the frequency of the output signal of the frequency synthesizer 23 into high frequency; An RF amplifier 25 amplifying the output signal of the frequency converter 24; A transmission antenna ANT1 for wirelessly transmitting the output signal of the RF amplifier 25; Wireless camcorder between the deck and the camera, characterized in that it comprises a. The audio FM modulator 21 sets different subcarrier frequencies for the right and left audio signals. The deck FM modulator 22 sets the subcarrier frequency of the deck signal to be different from the subcarrier frequency of the audio signal. The method of claim 1, wherein the radio receiver 30 A reception antenna ANT2 for receiving a radio signal from the radio transmitter 20; An RF band pass filter 31 for band-passing the received signal from the receive antenna ANT2; An RF amplifier 32 amplifying the output signal of the band pass filter; A frequency converter 33 for mixing the frequency of the output signal of the RF amplifier 32 and the oscillation frequency to provide an intermediate frequency (IF) signal; An IF band pass filter 34 for passing an intermediate frequency signal among the output signals of the frequency converter 33; An FM demodulation unit 35 for demodulating the output signal of the IF band pass filter 34; A band pass filter 36 for passing each of the video signal, the audio signal, and the deck signal output from the FM demodulator 35 for each corresponding band; A video buffer unit 37 for outputting a video signal from the band pass filter unit 36; An audio FM demodulation unit 38 for demodulating the audio signal from the band pass filter unit 36 into right and left audio signals; A deck FM demodulator 39 for demodulating the deck signal from the band pass filter 36; Wireless camcorder between the deck and the camera, characterized in that it comprises a. According to claim 1, wherein the band pass filter 36 A first filter 36a for band-passing the video signal from the FM demodulator 35; Second and third filters 36b and 36c for band-passing the right and left audio signals from the FM demodulator 35, respectively; A fourth filter 36d for band-passing the deck signal from the FM demodulator 35; Wireless camcorder between the deck and the camera, characterized in that it comprises a. In a wireless camcorder, A camera unit 10 photographing a subject, inputting a voice signal, and controlling a deck unit; An audio FM modulator 21 for modulating the audio signal from the camera unit 10 into right and left audio signals; A deck FM modulator 22 for modulating the deck signal from the camera unit 10; A frequency synthesizer 23 for synthesizing the frequencies of the video signal from the camera unit 10, the audio signal of the audio FM modulator 21, and the deck signal of the deck FM modulator 22; A frequency converter 24 for converting the frequency of the output signal of the frequency synthesizer 23 into high frequency; An RF amplifier 25 amplifying the output signal of the frequency converter 24; A transmission antenna ANT1 for wirelessly transmitting the output signal of the RF amplifier 25; A receiving antenna ANT2 for receiving a radio signal from the transmitting antenna ANT1; An RF band pass filter 31 for band-passing the received signal from the receive antenna ANT2; An RF amplifier 32 amplifying the output signal of the band pass filter; A frequency converter 33 for mixing the frequency of the output signal of the RF amplifier 32 and the oscillation frequency to provide an intermediate frequency (IF) signal; An IF band pass filter 34 for passing an intermediate frequency signal among the output signals of the frequency converter 33; An FM demodulation unit 35 for demodulating the output signal of the IF band pass filter 34; A band pass filter 36 for passing each of the video signal, the audio signal, and the deck signal output from the FM demodulator 35 for each corresponding band; A video buffer unit 37 for outputting a video signal from the band pass filter unit; An audio FM demodulation unit 38 for demodulating the audio signal from the band pass filter unit into right and left audio signals; A deck FM demodulator 39 for demodulating the deck signal from the band pass filter; A deck unit 40 for recording and reproducing an output signal from the deck FM demodulator 39; Wireless camcorder between the deck and the camera comprising a.